Mt ect read 184f
My eot read 193f
This was on an 8mile straight road about as flat as it gets set cruise to 56 out side air temp is 54f does this appear to be an issue forming. What should my running temps be

I believe you may need to run the truck alittle longer if it was only an 8 mile road. something like 30-40 minutes at 65 to get a clearer picture of your trucks deltas....
Someone whom knows forsure will chime in and let ya know...

Mt ect read 184f
My eot read 193f
This was on an 8mile straight road about as flat as it gets set cruise to 56 out side air temp is 54f does this appear to be an issue forming. What should my running temps be

I got a brand new t-stat a while ago......Let's just say motorcraft's quality control isn't exactly that great....Me, you and others get new T-stats that seem to open at 184 to 188....I've been told you can modify them to the right spot with small shims/washers...Will try it some day....

So before you go changing it out just to possibly get the same results, the real question is does the delta range remain the same with the lower temps or will the oil heat up more regardless after so long.

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